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CN106660413B - Pneumatic tire - Google Patents

Pneumatic tire Download PDF

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Publication number
CN106660413B
CN106660413B CN201580046421.0A CN201580046421A CN106660413B CN 106660413 B CN106660413 B CN 106660413B CN 201580046421 A CN201580046421 A CN 201580046421A CN 106660413 B CN106660413 B CN 106660413B
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CN
China
Prior art keywords
rubber
tire
belt
tread
layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201580046421.0A
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Chinese (zh)
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CN106660413A (en
Inventor
岸添勇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yokohama Rubber Co Ltd
Original Assignee
Yokohama Rubber Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yokohama Rubber Co Ltd filed Critical Yokohama Rubber Co Ltd
Publication of CN106660413A publication Critical patent/CN106660413A/en
Application granted granted Critical
Publication of CN106660413B publication Critical patent/CN106660413B/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C19/00Tyre parts or constructions not otherwise provided for
    • B60C19/08Electric-charge-dissipating arrangements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/0041Tyre tread bands; Tread patterns; Anti-skid inserts comprising different tread rubber layers
    • B60C11/005Tyre tread bands; Tread patterns; Anti-skid inserts comprising different tread rubber layers with cap and base layers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C19/00Tyre parts or constructions not otherwise provided for
    • B60C19/08Electric-charge-dissipating arrangements
    • B60C19/082Electric-charge-dissipating arrangements comprising a conductive tread insert
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C19/00Tyre parts or constructions not otherwise provided for
    • B60C19/08Electric-charge-dissipating arrangements
    • B60C19/084Electric-charge-dissipating arrangements using conductive carcasses
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C19/00Tyre parts or constructions not otherwise provided for
    • B60C19/08Electric-charge-dissipating arrangements
    • B60C19/088Electric-charge-dissipating arrangements using conductive beads
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C2200/00Tyres specially adapted for particular applications
    • B60C2200/04Tyres specially adapted for particular applications for road vehicles, e.g. passenger cars
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/80Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/86Optimisation of rolling resistance, e.g. weight reduction 

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)

Abstract

The present invention, which takes into account resistance to rolling resistance performance and high-speed durability and resistance, reduces performance.Have:Belt (7);Belt reinforcing layer (8);Fetus face (2);Side of sidewall portion (4);Rim cushion rubber (5A);Conductive rubber (11), is configured together with rim cushion rubber, is set as:One end is exposed to the outer surface of rim cushion rubber, and to be contacted with wheel rim, the other end is contacted with the tire member of formation for being adjacent to rim cushion rubber, and about resistance value, a part for conductive rubber and fetus face is 1 × 106Ω is hereinafter, the coating rubber of tire member of formation, the coating rubber of belt and belt reinforcing layer is 1 × 106Ω or more and 1 × 108Ω is hereinafter, the sidewall rubber (4A) of rim cushion rubber and side of sidewall portion is 1 × 108Ω or more.

Description

Pneumatic tire
Technical field
The present invention relates to can take into account resistance to rolling resistance performance and high-speed durability and resistance to reduce the inflated wheel of performance Tire.
Background technology
In the past, for example, patent document 1 discloses following pneumatic tire, that is, have:Fetus face, side of sidewall portion, bead part, from Fetus face is via side of sidewall portion until carcass, the buffer layer on the outside of the tire radius direction of carcass of bead part, are respectively formed In the volume resistivity of the tread-rubber of fetus face, buffer layer and side of sidewall portion, buffer layer rubber and sidewall rubber be 1 × 108Ω cm or more, the pneumatic tire are further equipped with:Conductive rubber is configured at the casing ply and sidewall rubber for constituting carcass Between and buffer layer and fetus face between, thickness be 0.2mm~3.0mm;Energization rubber, to be connect with conductive rubber and one The mode that part is exposed to the surface of fetus face is embedded in fetus face;Clinch apex links with the lower end of conductive rubber, and configures In the region that the rim flange with bead part connects, the volume resistivity of conductive rubber, energization rubber and clinch apex is less than 1 ×108Ω·cm。
Existing technical literature
Patent document
Patent document 1:Japanese Unexamined Patent Publication 2009-023504 bulletins
Invention content
Problems to be solved by the invention
The purpose of the pneumatic tire of above patent document 1 is, maintains relatively low by rolling resistance, while by road surface and taking turns Generated electrostatic effectively discharges tire in motion.But the pneumatic tire of patent document 1 has:Conductive rubber is configured at Between the casing ply and sidewall rubber of composition carcass and between buffer layer and fetus face, thickness is 0.2mm~3.0mm;Side mouthful Line with rubber links with the lower end of conductive rubber, and is configured at the region to connect with the rim flange of bead part, their volume resistance Rate is set as being less than 1 × 108Ω·cm.That is, in the pneumatic tire of patent document 1, it is between casing ply and sidewall rubber and slow The clinch apex of the conductive rubber, the region to connect with the rim flange of bead part that rush between layer and fetus face is by the low rubber of resistance Glue material is formed.As a result, since the low rubber material fever of resistance is big, resistance to rolling resistance performance, high speed durability It can tend to reduce.
The present invention is to complete in view of the above problems, its purpose is to provide it is a kind of can take into account resistance to rolling resistance performance with And high-speed durability and resistance reduce the pneumatic tire of performance.
Technical solution
In order to solve the above problems and realize purpose, the pneumatic tire of the first invention is characterized in that having:Fetus face, It is configured in a manner of exposing to tire outermost radial outside and is grounded with road surface;Belt is configured at the tire diameter of the fetus face Inwardly;Belt reinforcing layer is configured at least part of the tire radial outside of the belt;Side of sidewall portion, to expose extremely The outermost mode of tire width direction configures;Rim cushion rubber is set to the position of bead part contacted with wheel rim;Conductive rubber Glue is configured together with the rim cushion rubber, is set as:One end is exposed to the outer surface of the rim cushion rubber, To be contacted with the wheel rim, the other end is contacted with the tire member of formation for being adjacent to the rim cushion rubber, about resistance A part for value, the conductive rubber and the fetus face is 1 × 106Ω is hereinafter, the tire member of formation, the banding The coating rubber of layer and the coating rubber of the belt reinforcing layer are 1 × 106Ω or more and 1 × 108Ω is hereinafter, the wheel rim The sidewall rubber of yielding rubber and the side of sidewall portion is 1 × 108Ω or more.
According to the pneumatic tire, the conductive rubber lower than rim cushion rubber by having resistance value enters from wheel rim Electricity flow to fetus face side by conductive rubber, tire member of formation.Therefore, with can not considering resistance value using low heat generation Rubber can improve resistance to rolling resistance performance and high-speed durability as rim cushion rubber.As a result, can take into account resistance to Rolling resistance performance and high-speed durability and resistance reduce performance.
Also, according to the pneumatic tire, conductive rubber becomes entrance of the electricity from wheel rim, the part of fetus face become electricity to The outlet on road surface is the most important part for reducing resistance value, therefore by the way that their resistance value is set as 1 × 106Ω Hereinafter, can significantly obtain that resistance is made to reduce the effect that performance improves.In addition, the coating rubber of tire member of formation, belt And the coating rubber of belt reinforcing layer forms the channel of electricity between conductive rubber and a part for fetus face, is to take into account reduction Rolling resistance and the part for reducing resistance value, therefore by the way that their resistance value is set as 1 × 106Ω or more and 1 × 108Ω with Under, it can significantly obtain the effect for taking into account resistance to rolling resistance performance and resistance reduction performance.In addition, rim cushion rubber and side The sidewall rubber of wall portion contributes to reduce rolling resistance and improves the part of high speed durability, therefore by by their electricity Resistance value is set as 1 × 108Ω or more can significantly obtain the effect for making resistance to rolling resistance performance and high-speed durability improve.
The pneumatic tire of second invention is characterized in that, in the first invention, the tire diameter in the end of the belt It is configured with belt edge yielding rubber inwardly, about resistance value, the belt edge yielding rubber is 1 × 106Ω or more and 1 ×108Ω or less.
According to the pneumatic tire, configured with belt edge yielding rubber, which exists The channel that electricity is formed between conductive rubber and a part for fetus face is to take into account the portion for reducing rolling resistance and reducing resistance value Point, therefore by the way that their resistance value is set as 1 × 106Ω or more and 1 × 108Ω is hereinafter, can significantly obtain taking into account resistance to rolling Resistance performance and resistance reduce the effect of performance.
The pneumatic tire of third invention is characterized in that in first or second invention, the fetus face has:Crown rubber Glue exposes to tread surface;Tread cushioning layer rubber, the cap rubber tire radial direction inner side and with the belt, institute It states belt reinforcing layer to connect, about resistance value, the cap rubber is 1 × 106Ω is hereinafter, the tread cushioning layer rubber is 1 × 106 Ω or more and 1 × 108Ω or less.
According to the pneumatic tire, a part for fetus face is configured to cap rubber, becomes the outlet to the electricity on road surface, passes through The resistance value of the most important cap rubber for reducing resistance value is set as 1 × 106Ω is hereinafter, can significantly obtain making resistance Reduce the effect that performance improves.In addition, tread cushioning layer rubber forms the channel of electricity between conductive rubber and cap rubber, it is to take into account It reduces rolling resistance and reduces the part of resistance value, therefore by the way that the resistance value of the tread cushioning layer rubber is set as 1 × 106Ω or more And 1 × 108Ω is hereinafter, the effect of resistance to rolling resistance performance and resistance reduction performance can significantly be obtained taking into account.
The pneumatic tire of 4th invention is characterized in that, in first or second invention, the fetus face has:Crown rubber Glue exposes to tread surface;Tread cushioning layer rubber, the cap rubber tire radial direction inner side and with the belt, institute It states belt reinforcing layer to connect, have in the fetus face:Contact to earth tread-rubber, is set as:Expose to tread surface, perforation one end The cap rubber and the tread cushioning layer rubber, the other end is contacted with the belt or the belt reinforcing layer, about electricity Resistance value, the tread-rubber that contacts to earth is 1 × 106Ω is hereinafter, the cap rubber and the tread cushioning layer rubber are 1 × 108Ω with On.
According to the pneumatic tire, a part for fetus face is configured to the tread-rubber that contacts to earth, and becomes outlet of the electricity to road surface, leads to It crosses and the resistance value of the most important tread-rubber that contacts to earth for reducing resistance value is set as 1 × 106Ω is hereinafter, can significantly obtain Resistance is set to reduce the effect that performance improves.In addition, by configuring the tread-rubber that contacts to earth, cap rubber and tread cushioning layer rubber can be made To help to reduce rolling resistance and improving the part of high speed durability, by the way that their resistance value is set as 1 × 108Ω with On, it can significantly obtain the effect for making resistance to rolling resistance performance and high-speed durability improve.
The pneumatic tire of 5th invention is characterized in that, in any invention in the first~the 4th invention, the tire Member of formation is that the both ends of tire width direction reach two bead parts and scroll up the body piles around setting in tire week, should The resistance value of the coating rubber of body piles is 1 × 106Ω or more and 1 × 108Ω or less.
According to the pneumatic tire, each tire width direction ends of body piles is by a pair of bead core from tire width direction It turns back on the outside of interior lateral tire width direction, and in the circumferential ground roll annular in shape of tire around constituting the skeleton of tire, therefore pass through So that the other end of conductive rubber is contacted with the body piles, can suitably make from the electric current that wheel rim enters to fetus face side, it can be significantly Ground obtains that resistance is made to reduce the effect that performance improves.In this way, according to its configuration, one in conductive rubber and fetus face of body piles / it is suitable as the channel of electricity, it is to take into account the part for reducing rolling resistance and reducing resistance value, therefore by by the carcass The resistance value of the coating rubber of layer is set as 1 × 106Ω or more and 1 × 108Ω is hereinafter, can significantly obtain taking into account resistance to rolling resistance Performance and resistance reduce the effect of performance.
The pneumatic tire of 6th invention is characterized in that, in any invention in the first~the 4th invention, the tire Member of formation is provided at the liner layer of tire inner surface, and the resistance value of the rubber of the liner layer is 1 × 106Ω or more and 1 × 108 Ω or less.
According to the pneumatic tire, liner layer reaches a pair of bead along tire inner surface, each tire width direction both ends The lower part of the bead core in portion, and annularly roll around and be bonded in tire circumferential direction, therefore by making the another of conductive rubber End is contacted with the liner layer, can suitably make, from the electric current that wheel rim enters to fetus face side, can significantly obtain that resistance is made to reduce The effect that performance improves.In this way, according to its configuration, liner layer is suitable as electricity between conductive rubber and a part for fetus face Channel, be to take into account the part for reducing rolling resistance and reducing resistance value, therefore by by the resistance value of the rubber of the liner layer It is set as 1 × 106Ω or more and 1 × 108Ω hereinafter, can significantly obtain, which takes into account resistance to rolling resistance performance and resistance, reduces performance Effect.
The pneumatic tire of 7th invention is characterized in that, in any invention in the first~the 4th invention, the tire Member of formation is provided at the bead-core of the bead part, and the resistance value of the rubber of the bead-core is 1 × 106Ω or more and 1 × 108 Ω or less.
According to the pneumatic tire, in the case that bead-core is tire member of formation, at one of conductive rubber and fetus face / channel of electricity is formed, it is to take into account the part for reducing rolling resistance and reducing resistance value, therefore by by the bead-core The resistance value of rubber is set as 1 × 106Ω or more and 1 × 108Ω is hereinafter, can significantly obtain taking into account resistance to rolling resistance performance and electricity Resistance reduces the effect of performance.
The pneumatic tire of 8th invention is characterized in that, in any invention in the first~the 4th invention, the tire Member of formation is provided at the tyre bead enhancement layer of the bead part, and the resistance value of the coating rubber of the tyre bead enhancement layer is 1 × 106Ω Above and 1 × 108Ω or less.
According to the pneumatic tire, in the case that tyre bead enhancement layer is tire member of formation, in conductive rubber and fetus face The channel that electricity is formed between a part is to take into account the part for reducing rolling resistance and reducing resistance value, therefore by by the tyre bead The resistance value of the coating rubber of enhancement layer is set as 1 × 106Ω or more and 1 × 108Ω is hereinafter, can significantly obtain taking into account resistance to rolling Resistance performance and resistance reduce the effect of performance.
Advantageous effect
The pneumatic tire of the present invention, which can take into account resistance to rolling resistance performance and high-speed durability and resistance, reduces performance.
Description of the drawings
Fig. 1 is the meridian sectional view of the pneumatic tire of embodiments of the present invention.
Fig. 2 is the meridian sectional view of the pneumatic tire of embodiments of the present invention.
Fig. 3 is the enlarged view of the main part of Fig. 1 and pneumatic tire shown in Fig. 2.
Fig. 4 is the enlarged view of the main part of Fig. 1 and pneumatic tire shown in Fig. 2.
Fig. 5 is the enlarged view of the main part of Fig. 1 and pneumatic tire shown in Fig. 2.
Fig. 6 is the enlarged view of the main part of Fig. 1 and pneumatic tire shown in Fig. 2.
Fig. 7 is the enlarged view of the main part of Fig. 1 and pneumatic tire shown in Fig. 2.
Fig. 8 is the enlarged view of the main part of Fig. 1 and pneumatic tire shown in Fig. 2.
Fig. 9 is the enlarged view of the main part of Fig. 1 and pneumatic tire shown in Fig. 2.
Figure 10 is the enlarged view of the main part of Fig. 1 and pneumatic tire shown in Fig. 2.
Figure 11 is the curve graph for indicating to be applied to the pressure of bead part when assembling wheel rim.
Figure 12 is the enlarged view of the main part of Fig. 1 and pneumatic tire shown in Fig. 2.
Figure 13 is the enlarged view of the main part of Fig. 1 and pneumatic tire shown in Fig. 2.
Figure 14 is the enlarged view of the main part of Fig. 1 and pneumatic tire shown in Fig. 2.
Figure 15 is the enlarged view of the main part of Fig. 1 and pneumatic tire shown in Fig. 2.
Figure 16 is the enlarged view of the main part of Fig. 1 and pneumatic tire shown in Fig. 2.
Figure 17 is the enlarged view of the main part of Fig. 1 and pneumatic tire shown in Fig. 2.
Figure 18 is the enlarged view of the main part of Fig. 1 and pneumatic tire shown in Fig. 2.
Figure 19 is the chart of the result of the performance test for the pneumatic tire for indicating the embodiment of the present invention.
Specific implementation mode
Hereinafter, based on attached drawing, detailed description of embodiments of the present invention.It should be noted that the present invention is not by this The restriction of embodiment.In addition, can replace and be easy comprising those skilled in the art in the inscape of the embodiment Element or substantially the same element.In addition, for multiple variations recorded in the embodiment, for ability For field technique personnel in apparent range, arbitrary combination can be carried out.
Fig. 1 and Fig. 2 is the meridian sectional view of the pneumatic tire of present embodiment.
In the following description, tire refers to radially the direction orthogonal with the rotary shaft of pneumatic tire 1 (not shown), tire Radially inner side refers in tire axially towards to the side of rotary shaft, and tire radial outside refers in tire radially away from rotation The side of axis.In addition, tire refers to circumferentially the circumferencial direction of the axis centered on the rotary shaft.In addition, tire width direction is Refer to the direction parallel with the rotary shaft, tire width direction inside refers on tire width direction towards equatorial plane The side of (tire equator line) CL, tire width direction outside refer to one far from equatorial plane CL on tire width direction Side.Equatorial plane CL refers to the rotating shaft direct cross with pneumatic tire 1, and logical from the center of the tyre width of pneumatic tire 1 The plane crossed.Tyre width is the width on tire width direction between the part in the outside of tire width direction, i.e., On tire width direction between the part farthest from equatorial plane CL with a distance from.Tire equator line refers to being located at tire equator On the CL of face and along the line of the tire of pneumatic tire 1 circumferential direction.In the present embodiment, tire equator line is accompanied by and tire equator The identical reference numeral in face " CL ".
As shown in Figure 1 and Figure 2, the pneumatic tire 1 of present embodiment has:Fetus face 2,2 both sides of fetus face tire shoulder Portion 3, from each shoulder portion 3 successively continuous side of sidewall portion 4 and bead part 5.In addition, the pneumatic tire 1 has:Body piles 6, banding Layer 7, belt reinforcing layer 8, liner layer 9.
Fetus face 2 is formed by tread-rubber 2A, is exposed in the outermost of the tire radial direction of pneumatic tire 1, surface is constituted The profile of pneumatic tire 1.In the peripheral surface of fetus face 2, that is, the tread contacted in motion with road surface is formed with tyre surface Surface 21.Tread surface 21 is circumferentially extended along tire, is equipped with as the multiple of the straight line major trough parallel with tire equator line CL (being 4 in present embodiment) major trough 22.Then, by these multiple major troughs 22, tread surface 21 was formed with along tire week To the ring shore 23 of multiple ribbed of extension.It should be noted that major trough 22 can also be circumferentially extended along tire, and bend Or it is formed deviously.In addition, tread surface 21 is equipped with the band slot upwardly extended in the side intersected with major trough 22 in ring shore 23 24.In the present embodiment, band slot 24 is shown in the outermost ring shore of tire width direction 23.Band slot 24 can be with master Slot 22 intersects or band slot 24 can also be that at least one end does not intersect with major trough 22 and terminated in ring shore 23.In band In the case that the both ends of slot 24 intersect with major trough 22, it is formed with ring shore 23 and is circumferentially divided into multiple block-like rings in tire Bank portion.It should be noted that band slot 24 can also extend relative to tire peripheral, oblique and bend or be bent landform At.
Shoulder portion 3 is position of the fetus face 2 in two outside of tire width direction.That is, shoulder portion 3 is by tread-rubber 2A shapes At.In addition, side of sidewall portion 4 exposes to the outermost of the tire width direction of pneumatic tire 1.The side of sidewall portion 4 is by sidewall rubber 4A shapes At.As shown in Figure 1, the tire diameter that sidewall rubber 4A is configured at the end of tread-rubber 2A in the end of tire radial outside is inside Side, sidewall rubber 4A are configured at the tyre width side of the end of aftermentioned rim cushion rubber 5A in the end of tire radial direction inner side Outward.In addition, as shown in Fig. 2, sidewall rubber 4A can be configured at the end of tread-rubber 2A in the end of tire radial outside The tire radial outside in portion simultaneously extends to shoulder portion 3.In addition, bead part 5 has bead core 51 and bead-core 52.Bead core 51 is logical Crossing will circlewise form as the steel bead wire of steel wire winding.Bead-core 52 is arranged in by being rolled in the position of bead core 51 The rubber material in space for going back to the tire width direction end of body piles 6 and being formed.The bead part 5 have expose to wheel rim R The rim cushion rubber 5A of the exterior portion of (being indicated with double dot dash line in Fig. 3~Fig. 8) contact.Rim cushion rubber 5A shapes At the periphery of bead part 5, and on the inside of the tire of bead part 5, it is arranged to the bead-core 52 on the outside of covering tire via lower end Position (side of sidewall portion 4).It should be noted that in Fig. 3~Fig. 8, in the case where pneumatic tire 1 is secured to wheel rim R, tire The tire radial direction inner side part of tire toe on the inside of the tire in circle portion 5 is pressed by wheel rim R and rim cushion rubber 5A is caused to deform.
By a pair of bead core 51, the side out of tire width direction is wide to tire for each tire width direction end of body piles 6 It spends on the outside of direction and turns back, and in the circumferential annular in shape ground roll of tire around constituting the skeleton of tire.For the body piles 6, carcass Cord (not shown) circumferentially has some angle relative to the angle of tire circumferential direction along tyre equatorial direction, also, in tire It is disposed side by side multiple to degree, the body cord is covered by coating rubber.Body cord by organic fiber (polyester, artificial silk, Nylon etc.) it is formed.The body piles 6 are at least provided with 1 layer.It should be noted that in Fig. 1 and Fig. 2, body piles 6 are set as:Quilt The end of fold-back covers entire bead-core 52, and body piles 6 may be set to be:The end being folded back is covered to bead-core 52 Halfway, bead-core 52 is contacted with rim cushion rubber 5A (with reference to Fig. 5).In addition it is also possible in the part of body piles 6 being folded back Tire width direction on the outside of tyre bead enhancement layer 10 is equipped between rim cushion rubber 5A, the tyre bead enhancement layer 10 is It is covered made of steel cord or organic fiber (polyester, artificial silk, nylon etc.) (with reference to Fig. 6) by coating rubber.
The multi-ply construction that belt 7 forms the banding 71,72 for being laminated at least 2 layers is configured in fetus face 2 as tire The tire radial outside of the periphery of body layer 6 covers body piles 6 in tire circumferential direction.Banding 71,72 is will be relative to tire circumferential direction It is covered by coating rubber with multiple cords (not shown) that defined angle (for example, 20 degree~30 degree) is arranged side by side 's.Cord is formed by steel or organic fiber (polyester, artificial silk, nylon etc.).In addition, the banding 71,72 to overlap each other is configured to Mutual cord intersects.In addition, as shown in Fig. 2, being configured at tread-rubber in the end of the tire radial outside of sidewall rubber 4A The tire radial outside of the end of 2A is simultaneously configured in the case of extending to shoulder portion 3, and belt edge yielding rubber 7A is configured In the end of belt 7 (banding 71) tire radial direction inner side between body piles 6.
Belt reinforcing layer 8 is configured at the tire radial outside as the periphery of belt 7, in tire circumferential direction overlying cover strip beam Layer 7.Belt reinforcing layer 8 is that substantially parallel (± 5 degree) are circumferential and being arranged side by side on tire width direction multiple in tire Made of cord (not shown) is covered by coating rubber.Cord is by steel or organic fiber (polyester, artificial silk, nylon etc.) shape At.Fig. 1 and belt reinforcing layer 8 shown in Fig. 2 are configured to cover entire belt 7, and laminated configuration is covering banding The tire width direction end of layer 7.The composition of belt reinforcing layer 8 is not limited to above-mentioned composition, although not expressing in figure, example It is such as configurable to cover entire belt 7 with 2 layers, or is configured to only cover the tire width direction end of belt 7.This Outside, although not expressing in figure, the composition of belt reinforcing layer 8 is for example configurable to cover entire belt 7 with 1 layer, Or it is configured to only cover the tire width direction end of belt 7.That is, at least tyre width of belt reinforcing layer 8 and belt 7 Direction end is overlapped.In addition, belt reinforcing layer 8 in tire circumferential direction to wind the band of band-like (such as width 10 [mm]) Mode is arranged.
Liner layer 9 is the tire inner surface i.e. inner peripheral surface of body piles 6, and each tire width direction both ends reach a pair of bead Position where the bead core 51 in portion 5, and annularly roll around and be bonded in tire circumferential direction.Liner layer 9 is for inhibiting empty Qi leel is penetrated to tire outside.It should be noted that as shown in Figure 1 and Figure 2, under the setting to bead core 51 of liner layer 9 Portion's (tire radial direction inner side), but as shown in Fig. 8 or Figure 12, can also be arranged to the tire of bead part 5, bead core 51 with Before.
Fig. 3~Fig. 8 is the enlarged view of the main part of Fig. 1 and pneumatic tire shown in Fig. 2.
As shown in Fig. 3~Fig. 8, in above-mentioned pneumatic tire 1, rim cushion rubber 5A is equipped with conductive rubber 11.It is conductive Rubber 11 is configured together with rim cushion rubber 5A, and is set as:One end 11a exposes to the appearance of rim cushion rubber 5A The part contacted with wheel rim R in face, other end 11b are contacted with the tire member of formation for being adjacent to rim cushion rubber 5A.In addition, Conductive rubber 11 is formed by the resistance value rubber material lower than rim cushion rubber 5A.The conductive rubber 11 can be in tire circumferential direction On be continuously provided, can also discontinuously be arranged.
The so-called tire member of formation for being adjacent to rim cushion rubber 5A indicates body piles 6 in Fig. 3 and Fig. 8, is scheming Liner layer 9 is indicated in 4 and Fig. 7, indicates bead-core 52 in Figure 5, indicates tyre bead enhancement layer 10 in figure 6.
It should be noted that as shown in Fig. 3~Fig. 8, conductive rubber 11 and the tire structure for being adjacent to rim cushion rubber 5A It contacts, but can also be contacted with multiple tire member of formation at component, can significantly more obtain that the electricity entered from wheel rim R is made to pass through Conductive rubber 11, tire member of formation and the effect for flowing to 2 side of fetus face.In addition, significantly more obtaining making to enter from wheel rim R Electricity in terms of conductive rubber 11, tire member of formation flow to the effect of 2 side of fetus face, preferably by the position of conductive rubber 11 It sets and is configured at one end 11a and exposes to the outer surface of rim cushion rubber 5A, other end 11b and be adjacent to rim cushion rubber 5A's The position of the shorter shortest distance of distance of tire member of formation contact.
In addition, in the pneumatic tire 1 of present embodiment, fetus face 2 is as being used as Fig. 1 and inflated wheel shown in Fig. 2 It Fig. 9 of the enlarged view of the main part of tire 1 and constitutes as shown in Figure 10.
As shown in figure 9, fetus face 2 has:Cap rubber 2Aa, the tread-rubber 2A for forming the fetus face 2 expose to tyre surface Surface 21;Tread cushioning layer rubber 2Ab is abutted in tire radial direction inner side and belt reinforcing layer 8, the belt 7 of cap rubber 2Aa.
In addition, as shown in Figure 10, there is fetus face 2 tread-rubber 12 that contacts to earth to be used as part of it.Contact to earth tread-rubber 12 are configured to:One end 12a exposes to the tread surface 21 of the outer surface as fetus face 2, penetrates through cap rubber 2Aa and bottom tire Face rubber 2Ab, other end 12b are contacted with belt reinforcing layer 8 or belt 7.
In thus configured pneumatic tire 1, have:Belt 7;Belt reinforcing layer 8;Fetus face 2;Side of sidewall portion 4;Wheel rim Yielding rubber 5A is set to the position of bead part 5 contacted with wheel rim R;Conductive rubber 11 carries out together with rim cushion rubber 5A Configuration, and is set as one end 11a and exposes to the outer surface of rim cushion rubber 5A, to be contacted with wheel rim R, other end 11b with It is adjacent to the tire member of formation contact of rim cushion rubber 5A, about resistance value, one of conductive rubber 11 and fetus face 2 It is divided into 1 × 106Ω is hereinafter, tire member of formation, the coating rubber of body piles 6, the coating rubber of belt 7 and belt reinforcing The coating rubber of layer 8 is 1 × 106Ω or more and 1 × 108Ω is hereinafter, the sidewall rubber of rim cushion rubber 5A and side of sidewall portion 4 4A is 1 × 108Ω or more.
According to the pneumatic tire 1, the conductive rubber 11 lower than rim cushion rubber 5A by having resistance value, from wheel rim R The electricity of entrance flow to 2 side of fetus face by conductive rubber 11, tire member of formation.Therefore, it uses with capable of not considering resistance value The rubber of low heat generation can improve resistance to rolling resistance performance and high-speed durability as rim cushion rubber 5A.It is tied Fruit is to take into account resistance to rolling resistance performance and high-speed durability and resistance to reduce performance.
Also, according to the pneumatic tire 1, conductive rubber 11 becomes entrance of the electricity from wheel rim R, the part of fetus face 2 at Outlet for from electricity to road surface is the most important part for reducing resistance value, therefore by the way that their resistance value is set as 1 ×106Ω is hereinafter, can significantly obtain that resistance is made to reduce the effect that performance improves.In addition, tire member of formation, belt 7 The coating rubber of coating rubber and belt reinforcing layer 8 forms the logical of electricity between conductive rubber 11 and a part for fetus face 2 Road is the part taken into account reduction rolling resistance and reduce resistance value, therefore by the way that their resistance value is set as 1 × 106Ω with It is upper and 1 × 108Ω reduces the effect of performance hereinafter, resistance to rolling resistance performance and resistance can be obtained significantly.In addition, rim cushion The sidewall rubber 4A of rubber 5A and side of sidewall portion 4 is contributed to reduce rolling resistance and is improved the part of high speed durability, because This by their resistance value by being set as 1 × 108Ω or more can significantly obtain keeping resistance to rolling resistance performance and high speed durable The effect that performance improves.
In addition, in the pneumatic tire 1 of present embodiment, the tire radial direction inner side in the end of belt 7 is configured with band Shu Bianyuan yielding rubber 7A, about resistance value, belt edge yielding rubber 7A is 1 × 106Ω or more and 1 × 108Ω or less.
According to the pneumatic tire 1, configured with belt edge yielding rubber 7A, the belt edge yielding rubber 7A forms the channel of electricity between conductive rubber 11 and a part for fetus face 2, is to take into account to reduce rolling resistance and reduction resistance The part of value, therefore by the way that their resistance value is set as 1 × 106Ω or more and 1 × 108Ω is hereinafter, can significantly be taken into account Resistance to rolling resistance performance and resistance reduce the effect of performance.
In addition, in the pneumatic tire 1 of present embodiment, fetus face 2 has:Cap rubber 2Aa exposes to tread surface 21;Tread cushioning layer rubber 2Ab connects in the tire radial direction inner side of cap rubber 2Aa with belt 7, belt reinforcing layer 8, about electricity Resistance value, cap rubber 2Aa are 1 × 106Ω is hereinafter, tread cushioning layer rubber 2Ab is 1 × 106Ω or more and 1 × 108Ω or less.
According to the pneumatic tire 1, a part for fetus face 2 is configured to cap rubber 2Aa, becomes outlet of the electricity to road surface, By the way that the resistance value of the most important cap rubber 2Aa for reducing resistance value is set as 1 × 106Ω is hereinafter, can significantly obtain To the effect for making resistance reduce performance raising.In addition, tread cushioning layer rubber 2Ab shapes between conductive rubber 11 and cap rubber 2Aa It is to take into account the part for reducing rolling resistance and reducing resistance value, therefore by by the electricity of tread cushioning layer rubber 2Ab at the channel of electricity Resistance value is set as 1 × 106Ω or more and 1 × 108Ω is hereinafter, can significantly obtain taking into account resistance to rolling resistance performance and resistance reduction property The effect of energy.
In addition, in the pneumatic tire 1 of present embodiment, fetus face 2 has:Cap rubber 2Aa exposes to tread surface 21;Tread cushioning layer rubber 2Ab connects in the tire radial direction inner side of cap rubber 2Aa with belt 7, belt reinforcing layer 8, in tyre surface There is the tread-rubber 12 that contacts to earth, the tread-rubber 12 that contacts to earth to be set as one end 12a and expose to tread surface 21 in portion 2, penetrate through crown rubber Glue 2Aa and tread cushioning layer rubber 2Ab, other end 12b are contacted with belt 7 or belt reinforcing layer 8, and about resistance value, contact to earth tire Face rubber 12 is 1 × 106Ω is hereinafter, cap rubber 2Aa and tread cushioning layer rubber 2Ab is 1 × 108Ω or more.
According to the pneumatic tire 1, a part for fetus face 2 is configured to the tread-rubber 12 that contacts to earth, and becomes electric going out to road surface Mouthful, by by for reducing resistance value the most important resistance value for contacting to earth tread-rubber 12 be set as 1 × 106Ω is hereinafter, can show It obtains with writing that resistance is made to reduce the effect that performance improves.In addition, by configuring the tread-rubber 12 that contacts to earth, cap rubber 2Aa and Tread cushioning layer rubber 2Ab can be as helping to reduce rolling resistance and improve the part of high speed durability, by by their electricity Resistance value is set as 1 × 108Ω or more can significantly obtain the effect for making resistance to rolling resistance performance and high-speed durability improve.
In addition, in the pneumatic tire 1 of present embodiment, tire member of formation is that the both ends of tire width direction reach two Bead part 5 is simultaneously scrolling up the body piles 6 around setting tire week, and the resistance value of the coating rubber of the body piles 6 is 1 × 106Ω Above and 1 × 108Ω or less.
According to the pneumatic tire 1, each tire width direction ends of body piles 6 is by a pair of bead core 51 from tyre width It turns back on the outside of lateral tire width direction in direction, and in the circumferential ground roll annular in shape of tire around constituting the skeleton of tire, therefore By making the other end 11b of conductive rubber 11 be contacted with the body piles 6, can suitably make from the electric current that wheel rim R enters to tyre surface 2 side of portion can significantly obtain that resistance is made to reduce the effect that performance improves.In this way, according to its configuration, body piles 6 are in conductive rubber It is suitable as the channel of electricity between 11 and a part (cap rubber 2Aa or the tread-rubber 12 that contacts to earth) for fetus face 2, is to take into account drop Low-rolling-resistance and the part for reducing resistance value, therefore by the way that the resistance value of the coating rubber of the body piles 6 is set as 1 × 106 Ω or more and 1 × 108Ω is hereinafter, the effect of resistance to rolling resistance performance and resistance reduction performance can significantly be obtained taking into account.
In addition, in the pneumatic tire 1 of present embodiment, tire member of formation is provided at the liner layer 9 of tire inner surface, The resistance value of the rubber of the liner layer 9 is 1 × 106Ω or more and 1 × 108Ω or less.
According to the pneumatic tire 1, for liner layer 9 along tire inner surface, each tire width direction both ends reach a pair of of tire The lower part of the bead core 51 in circle portion 5, and annularly roll around and be bonded in tire circumferential direction, therefore by making conductive rubber 11 Other end 11b contacted with the liner layer 9, can suitably make the electric current entered from wheel rim R to 2 side of fetus face, can significantly obtain To the effect for making resistance reduce performance raising.In this way, according to its configuration, liner layer 9 is in conductive rubber 11 and one of fetus face 2 It is suitable as the channel of electricity between point (cap rubber 2Aa or the tread-rubber 12 that contacts to earth), is to take into account to reduce rolling resistance and reduction The part of resistance value, therefore by the way that the resistance value of the rubber of the liner layer 9 is set as 1 × 106Ω or more and 1 × 108Ω hereinafter, It can significantly obtain taking into account the effect of resistance to rolling resistance performance and resistance reduction performance.
In addition, in the pneumatic tire 1 of present embodiment, tire member of formation is provided at the bead-core 52 of bead part 5, should The resistance value of the rubber of bead-core 52 is 1 × 106Ω or more and 1 × 108Ω or less.
According to the pneumatic tire 1, in the case that bead-core 52 is tire member of formation, in conductive rubber 11 and fetus face 2 A part (cap rubber 2Aa or the tread-rubber 12 that contacts to earth) between form the channel of electricity, be to take into account to reduce rolling resistance and drop The part of low-resistance value, therefore by the way that the resistance value of the rubber of the bead-core 52 is set as 1 × 106Ω or more and 1 × 108Ω with Under, it can significantly obtain the effect for taking into account resistance to rolling resistance performance and resistance reduction performance.
In addition, in the pneumatic tire 1 of present embodiment, tire member of formation is provided at the tyre bead enhancement layer of bead part 5 10, the resistance value of the coating rubber of the tyre bead enhancement layer 10 is 1 × 106Ω or more and 1 × 108Ω or less.
According to the pneumatic tire 1, in the case that tyre bead enhancement layer 10 is tire member of formation, in conductive rubber 11 and tyre surface Formed between the part (cap rubber 2Aa or the tread-rubber 12 that contacts to earth) in portion 2 electricity channel, be take into account reduce rolling resistance and The part of resistance value is reduced, therefore by the way that the resistance value of the coating rubber of the tyre bead enhancement layer 10 is set as 1 × 106Ω or more and 1×108Ω is hereinafter, the effect of resistance to rolling resistance performance and resistance reduction performance can significantly be obtained taking into account.
In addition, in the pneumatic tire 1 of present embodiment, as shown in Fig. 4, Fig. 7 and Fig. 8, preferably:It is cutd open in meridian One end 11a in face, conductive rubber 11 is configured at than the level on the basis of the tire radial direction inner side end of the bead core 51 of bead part 5 Line H is close to the position of tire radial direction inner side.
It is horizontal in the case where being fixed as meridian section shearing sample to be equivalent to the rim width of aftermentioned regular wheel rim Line H is orthogonal with equatorial plane CL, parallel with tire width direction.In addition, in Fig. 4, Fig. 7 and Fig. 8, range A-B be by When pneumatic tire 1 is assembled to wheel rim R, range that bead part 5 is contacted with wheel rim R.Then, in range A-B, position C is tyre bead The tire radial direction inner side of the tire inner end of core 51, position D are the tire radial direction inner side of the tire outboard end of bead core 51, position E is on horizontal line H, and position F is on the outside of the tire of the tire radial outside of bead core 51, and position G is on the outside of the tire of bead part 5 Inflection point.In Figure 11 as the curve graph for the pressure for indicating to be applied to bead part 5 when wheel rim assembles, range A- is shown The pressure of each position in B.In addition, in fig. 11, solid line is indicated in static state (when vehicle stops or when low vehicle speeds) It is applied to the pressure of bead part 5, dotted line expression (150km/h or more) when running at high speed is applied to the pressure of bead part 5.
As shown in figure 11, in the range of from than horizontal line H close to the position A to position E of tire radial direction inner side, due to tire It encloses core 51 and is embedded in wheel rim R, therefore the pressure of the contact with wheel rim R is high, is steadily contacted with wheel rim R when running at high speed.Cause This, by being configured at one end 11a of conductive rubber 11 than the horizontal line H on the basis of the tire radial direction inner side end of bead core 51 Close to the position of tire radial direction inner side, resistance can be efficiently reduced, while resistance to rolling resistance performance and high speed can be sought durable Performance is taken into account.It should be noted that as shown in figure 11, in the range of from position F to position G, when static, with wheel rim R's Contact pressure is high, and when running at high speed, bead part 5 is easy to generate displacement centered on bead core 51, tends to drop with the contact pressure of wheel rim R It is low.
In addition, in the pneumatic tire 1 of present embodiment, the master such as Fig. 1 and pneumatic tire shown in Fig. 21 It wants shown in Figure 12 of magnified partial view, preferably:In meridian section, the other end 11b of conductive rubber 11 is configured opposite In the range of ± 45 ° of the normal N of the profile of bead part 5 at the position P with one end 11a.
As shown in figure 12, it is fixed as being equivalent to the rim width of aftermentioned regular wheel rim by meridian section shearing sample Under state, the position P of one end 11a is the center of the width of one end 11a in a thickness direction.The wheel of normal N and bead part 5 Tangent line T at wide position P is orthogonal.Then, by configuring other end 11b in ± 45 ° of the range relative to the normal N It is interior, inhibit the increase of the volume of conductive rubber 11, therefore can inhibit to generate heat and maintain resistance to rolling resistance performance and high speed durable Performance.
In addition, in the pneumatic tire 1 of present embodiment, the master such as Fig. 1 and pneumatic tire shown in Fig. 21 It wants shown in Figure 13~Figure 18 of magnified partial view, width W1, W2, the W3 of conductive rubber 11 on the thickness direction of meridian section are excellent It is selected as 0.5mm or more and 10.0mm or less.
Width W1 be the centre of one end 11a and other end 11b of conductive rubber 11 maximum (the case where centre broadens) or Minimum dimension (the case where centre narrows), width W2 are the sizes of one end 11a of conductive rubber 11, and width W3 is conductive rubber 11 Other end 11b size.
In the case where the minimum dimension of width W1, W2, W3 of conductive rubber 11 are less than 0.5mm, electric conductivity is low, resistance drops Inefficient fruit tends to reduce.On the other hand, the case where the full-size of width W1, W2, W3 of conductive rubber 11 are more than 10.0mm Under, the volume of conductive rubber 11 is big, and fever becomes larger, therefore resistance to rolling resistance performance and high-speed durability tend to reduce.Cause This, reduces aspect of performance, preferably by conductive rubber 11 taking into account resistance to rolling resistance performance and high-speed durability and resistance Width W1, W2, W3 are set as 0.5mm or more and 10.0mm or less.
In addition, in the pneumatic tire 1 of present embodiment, such as the main of Fig. 1 and pneumatic tire shown in Fig. 2 Shown in Figure 13~Figure 18 of magnified partial view, preferably:Conductive rubber 11 the thickness direction of meridian section width W1, W2, W3 are 0.5mm or more and 6.0mm or less.
In the case where each size of width W1, W2, W3 of conductive rubber 11 is less than 0.5mm, electric conductivity is low, and resistance reduces effect Fruit tends to reduce.On the other hand, if each size of width W1, W2, W3 of conductive rubber 11 is set as 6.0mm hereinafter, if inhibit The increase of the volume of conductive rubber 11 simultaneously inhibits fever to become larger.Therefore, resistance to rolling resistance performance and high speed durability are being taken into account Aspect of performance can be reduced with resistance, width W1, W2, W3 of conductive rubber 11 are preferably set as 0.5mm or more and 6.0mm or less.
Here, following form in figure 13 illustrates:Conductive rubber 11 is equably formed from one end 11a to other end 11b Width W1, W2, W3.In addition, following form is shown in FIG. 14:From one end 11a to other end 11b, the width of conductive rubber 11 W1 forms wider halfway.In the form shown in the Figure 14, width W2, W3 of one end 11a and other end 11b are 0.5mm or more, the wider width W1 in midway be 10.0mm (preferably 6.0mm) below.In the form shown in Figure 14, Since the width W1 of conductive rubber 11 forms wider halfway, it is easy to be powered, can significantly obtains resistance reducing effect. In addition, following form is shown in FIG. 15:Width W2, W3 equalization and shape of one end 11a and other end 11b of conductive rubber 11 As the width W1 wide than midway.In addition, being shown below form in Figure 16 and Figure 17:One end 11a's of conductive rubber 11 The one of the width W3 of width W2 or other end 11b is rectangular wider at obtaining.In addition, following form is shown in FIG. 18:Conductive rubber Width W2, W3 of 11 one end 11a and other end 11b are formed as the width W1 wide than midway, and the width W2 of one end 11a Be formed as the width W3 wide than other end 11b.In the form shown in Figure 15~Figure 18, the width W1 of midway be 0.5mm with It is upper, width W2, W3 of one end 11a and other end 11b be 10.0mm (preferably 6.0mm) below.In Figure 15~figure In form shown in 18, with the sides wheel rim R or the width W2 or another of one end 11a of the conductive rubber 11 of tire member of formation side contacts The width W3 of one end 11b is formed as the width W1 wide than midway, therefore, because the increase of contact area, electric discrepancy becomes good It is good, and can significantly obtain resistance reducing effect.Also, in the form shown in Figure 18, one end 11a of conductive rubber 11 and Width W2, W3 of other end 11b is formed as the width W1 wide than midway, and the width W2 of one end 11a is formed as comparing the other end The width W3 wide of 11b, therefore, the entrance of the electricity from the sides wheel rim R become better, and can significantly more obtain resistance reduction effect Fruit.
Therefore, in the pneumatic tire of present embodiment 1, preferably:In meridian section, one end of conductive rubber 11 11a is bigger than the maximum width W1 between other end 11b in the width W2 of thickness direction.Moreover it is preferred that:In meridian section In, the other end 11b of conductive rubber 11 is bigger than the maximum width W1 between the 11a of one end in the width W3 of thickness direction.Moreover, Preferably:In meridian section, one end 11a of conductive rubber 11 is in width of the width W2 of thickness direction than other end 11b W3 is big.
In addition, in the pneumatic tire 1 of present embodiment, preferably conductive rubber 11 is equipped at multiple positions.
By being equipped with conductive rubber 11 at multiple positions, resistance reducing effect can be significantly obtained.In this case, such as Figure 11 It is shown, in terms of seeking resistance reducing effect, preferably at least one end 11a of conductive rubber 11 is configured at from connecing to wheel rim R Press the range of relatively high position A to position E or from position F to the range of position G.In particular, seeking the resistance to reduce In terms of effect, more preferably at least one end 11a of conductive rubber 11 is configured to the contact pressure of wheel rim R higher position always Multiple positions in the range of A to position E.Moreover, in terms of seeking resistance reducing effect, further preferably by conductive rubber 11 At least one end 11a configurations from as to the lower part of the contact pressure higher bead core 51 always of wheel rim R, (tire diameter is inside Side) position C to position D range multiple positions.
In addition, in the pneumatic tire 1 of present embodiment, preferably:The coating rubber and side of sidewall portion 4 of body piles 6 Losstangenttanδs of the sidewall rubber 4A at 60 DEG C be 0.12 hereinafter, and body piles 6 coating rubber and side wall The resistance value of the sidewall rubber 4A in portion 4 is 1 × 107Ω or more.It should be noted that the losstangenttanδ at 60 DEG C is set For the measurement depending on the sample selected by the pneumatic tire 1.
According to the pneumatic tire 1, the coating rubber of body piles 6 and the sidewall rubber of side of sidewall portion 4 are provided as described above 4A, thus, it is possible to, as the coating rubber of body piles 6 and the sidewall rubber 4A of side of sidewall portion 4, can be shown using the rubber of low heat generation It is improved resistance to rolling resistance performance and the effect of high-speed durability with writing, and high speed can also be sought to manipulate stability In heat resistanceheat resistant sagging performance raising.
Embodiment
In the present embodiment, a variety of pneumatic tires different to condition carry out and the tire resistance as resistance reduction performance Value, resistance to rolling resistance performance, high-speed durability (band flare) relevant performance test (referring to Fig.1 9).
In the performance test, tire size 235/45R19 pneumatic tires (experiment tire) are being assembled in 19 × 8J just Gauge wheel rim fills regular internal pressure (250kPa).
Here, so-called regular wheel rim is by JATMA defineds " standard rim ", by the " Design of TRA defineds Rim " or " Measuring Rim " by ETRTO defineds.In addition, so-called regular internal pressure be by JATMA defineds " most High-altitude air pressure ", " TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES " by TRA defineds In recorded maximum value or " INFLATION PRESSURES " by ETRTO defineds.In addition, so-called regular load is By " maximum loadability " of JATMA defineds, by " the TIRE LOAD LIMITS AT VARIOUS COLD of TRA defineds Recorded maximum value or " LOAD CAPACITY " by ETRTO defineds in INFLATION PRESSURES ".
The appraisal procedure of the tire resistance value of performance is reduced as resistance is:Under conditions of 23 DEG C of temperature, humidity 50%, Apply the voltage of 1000 [V], measures the resistance value Ω of the resistance value between tread surface and wheel rim.The evaluation indicates:Numerical value is smaller, puts Electrically more excellent, it is more excellent that resistance reduces performance.
The evaluation method of resistance to rolling resistance performance is:Using indoor drum tester, measuring load is 4kN and speed is Resistance when 50km/h.Then, it is based on the measurement result, into being about to index assessment of the previous example as benchmark (100).The evaluation It indicates:Index is bigger, and rolling resistance is smaller, and resistance to rolling resistance performance is more excellent.
The evaluation method of high-speed durability is:It is set as experiment tire to increase to 120% internal pressure of regulation internal pressure, After temperature makes it dry deterioration 5 days in the environment of being 80 DEG C, it is set as regulation internal pressure, uses the band flare that roller diameter is 1707mm Drum tester, started running with speed 120km/h, load 5kN, on one side speed was increased into 10km/h in every 24 hours, on one side Experiment is carried out until tyre damage, operating range when measuring damaged.Then, it is based on the measurement, into being about to previous example as base The index assessment of accurate (100).The evaluation indicates:Index is bigger, and high-speed durability is more excellent.
In Figure 19, the pneumatic tire of previous example and comparative example does not have conductive rubber.The inflated wheel mould of comparative example Have:Contact to earth tread-rubber, is set as one end and exposes to tread surface, penetrates through the cap rubber and tread cushioning layer rubber of fetus face, The other end is contacted with belt or belt reinforcing layer, one end and the other end it is of same size.On the other hand, embodiment 1~reality There is the pneumatic tire for applying example 9 conductive rubber shown in Fig. 8, the pneumatic tire of embodiment 10 to have conductive rubber shown in Fig. 7, There is the pneumatic tire of embodiment 11 conductive rubber shown in fig. 5, the pneumatic tire of embodiment 12 to have conductive rubber shown in fig. 6 Glue.In addition, the pneumatic tire of embodiment 1 and embodiment 2, embodiment 5 and embodiment 6 has belt edge yielding rubber. In addition, the pneumatic tire of 1~embodiment of embodiment 4 does not have the tread-rubber that contacts to earth, the pneumatic tire of 5~embodiment of embodiment 12 With the tread-rubber that contacts to earth.
As shown in the test result of Figure 19, it is known that:The pneumatic tire of 1~embodiment of embodiment 12 has taken into account resistance to rolling resistance Performance and high-speed durability and the tire resistance value that performance is reduced as resistance.
Symbol description
1 pneumatic tire
2 fetus faces
21 tread surfaces
2A tread-rubbers
2Aa cap rubbers
The tread cushioning layers 2Ab rubber
4 side of sidewall portion
4A sidewall rubbers
5 bead parts
5A rim cushion rubbers
52 bead-cores
6 body piles
7 belts
7A belt edge yielding rubbers
8 belt reinforcing layers
9 liner layers
10 tyre bead enhancement layers
11 conductive rubbers
The one end 11a
The 11b other ends
12 contact to earth tread-rubber
The one end 12a
The 12b other ends
R wheel rims

Claims (8)

1. a kind of pneumatic tire, which is characterized in that have:
Fetus face is configured in a manner of exposing to tire outermost radial outside and is grounded with road surface;
Belt is configured at the tire radial direction inner side of the fetus face;
Belt reinforcing layer is configured at least part of the tire radial outside of the belt;
Side of sidewall portion, by expose to tire width direction it is outermost in a manner of configure;
Rim cushion rubber is set to the position of bead part contacted with wheel rim;
Conductive rubber is configured together with the rim cushion rubber, is set as:Expose to the rim cushion rubber one end Outer surface, to be contacted with the wheel rim, the other end is contacted with the tire member of formation for being adjacent to the rim cushion rubber,
The fetus face has:Cap rubber exposes to tread surface;Tread cushioning layer rubber, in the tire diameter of the cap rubber Connect inwardly and with the belt, the belt reinforcing layer,
About resistance value, the conductive rubber and the cap rubber are 1 × 106Ω hereinafter, the tread cushioning layer rubber be 1 × 106Ω or more and 1 × 108Ω is hereinafter, the tire member of formation, the coating rubber of the belt and the belt reinforcing The coating rubber of layer is 1 × 106Ω or more and 1 × 108Ω is hereinafter, the side wall of the rim cushion rubber and the side of sidewall portion Rubber is 1 × 108Ω or more,
The resistance value of the cap rubber is lower than the resistance value of the tread cushioning layer rubber.
2. pneumatic tire according to claim 1, which is characterized in that
Tire radial direction inner side in the end of the belt is configured with belt edge yielding rubber, about resistance value, the band Shu Bianyuan yielding rubbers are 1 × 106Ω or more and 1 × 108Ω or less.
3. pneumatic tire according to claim 1 or 2, which is characterized in that
The tire member of formation is that the both ends of tire width direction reach two bead parts and scroll up winding in tire week The resistance value of the body piles set, the coating rubber of the body piles is 1 × 106Ω or more and 1 × 108Ω or less.
4. pneumatic tire according to claim 1 or 2, which is characterized in that
The tire member of formation is provided at the liner layer of tire inner surface, and the resistance value of the rubber of the liner layer is 1 × 106 Ω or more and 1 × 108Ω or less.
5. pneumatic tire according to claim 1 or 2, which is characterized in that
The tire member of formation is provided at the bead-core of the bead part, and the resistance value of the rubber of the bead-core is 1 × 106 Ω or more and 1 × 108Ω or less.
6. pneumatic tire according to claim 1 or 2, which is characterized in that
The tire member of formation is provided at the tyre bead enhancement layer of the bead part, the electricity of the coating rubber of the tyre bead enhancement layer Resistance value is 1 × 106Ω or more and 1 × 108Ω or less.
7. a kind of pneumatic tire, which is characterized in that have:
Fetus face is configured in a manner of exposing to tire outermost radial outside and is grounded with road surface;
Belt is configured at the tire radial direction inner side of the fetus face;
Belt reinforcing layer is configured at least part of the tire radial outside of the belt;
Side of sidewall portion, by expose to tire width direction it is outermost in a manner of configure;
Rim cushion rubber is set to the position of bead part contacted with wheel rim;
Set on tire inner surface and it is adjacent to the liner layer of the rim cushion rubber;
Conductive rubber is configured together with the rim cushion rubber, is set as:Expose to the rim cushion rubber one end Outer surface, to be contacted with the wheel rim, the other end is contacted with the liner layer,
The fetus face has:Cap rubber exposes to tread surface;Tread cushioning layer rubber, in the tire diameter of the cap rubber Connect inwardly and with the belt, the belt reinforcing layer,
Have in the fetus face:Contact to earth tread-rubber, is set as:One end is exposed to tread surface, and the cap rubber is penetrated through And the tread cushioning layer rubber, the other end are contacted with the belt or the belt reinforcing layer,
About resistance value, the conductive rubber is 1 × 106Ω is hereinafter, the coating rubber of the belt and the belt reinforcing The coating rubber of layer is 1 × 106Ω or more and 1 × 108Ω is hereinafter, the side wall of the rim cushion rubber and the side of sidewall portion Rubber is 1 × 108Ω or more,
The tread-rubber that contacts to earth is 1 × 105Ω, the cap rubber and the tread cushioning layer rubber are 1 × 108Ω,
The resistance value of the rubber of the liner layer is 1 × 106Ω or more and 1 × 108Ω or less.
8. a kind of pneumatic tire, which is characterized in that have:
Fetus face is configured in a manner of exposing to tire outermost radial outside and is grounded with road surface;
Belt is configured at the tire radial direction inner side of the fetus face;
Belt reinforcing layer is configured at least part of the tire radial outside of the belt;
Side of sidewall portion, by expose to tire width direction it is outermost in a manner of configure;
Rim cushion rubber is set to the position of bead part contacted with wheel rim;
Set on the bead-core of the bead part,
Conductive rubber is configured together with the rim cushion rubber, is set as:Expose to the rim cushion rubber one end Outer surface, to be contacted with the wheel rim, the other end is contacted with the bead-core,
The fetus face has:Cap rubber exposes to tread surface;Tread cushioning layer rubber, in the tire diameter of the cap rubber Connect inwardly and with the belt, the belt reinforcing layer,
Have in the fetus face:Contact to earth tread-rubber, is set as:One end is exposed to tread surface, and the cap rubber is penetrated through And the tread cushioning layer rubber, the other end are contacted with the belt or the belt reinforcing layer,
About resistance value, the conductive rubber is 1 × 106Ω is hereinafter, the coating rubber of the belt and the belt reinforcing The coating rubber of layer is 1 × 106Ω or more and 1 × 108Ω is hereinafter, the side wall of the rim cushion rubber and the side of sidewall portion Rubber is 1 × 108Ω or more,
The tread-rubber that contacts to earth is 1 × 105Ω, the cap rubber and the tread cushioning layer rubber are 1 × 108Ω,
The resistance value of the rubber of the bead-core is 1 × 106Ω or more and 1 × 108Ω or less.
CN201580046421.0A 2014-09-05 2015-08-28 Pneumatic tire Active CN106660413B (en)

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